System for preparing and displacing tissue

Abstract

A dental handpiece to which various tools forming a tool set can be coupled, and more precisely a handpiece coupling, which can be driven by a drive in the dental handpiece at least for an axial oscillating motion The coupling is constituted for a connection of the tools by insertion and securing, and more precisely with a conically tapering opening, into which an adapted coupling section of the tools that tapers in the shape of a truncated cone can be introduced and secured in a suitable manner.

The invention claimed is: 
     
       1. A dental system for preparing and displacing tissue, comprising:
 a dental handpiece comprising a drive; 
 a handpiece coupling; and 
 a tool shaped and dimensioned for selective insertion in the dental handpiece coupling, wherein the dental handpiece coupling and the tool are driven by the drive in an oscillating manner and wherein the tool comprises a cutting tool, the cutting tool is a bone saw having cutting edges of cutting blades arranged on opposite sides of a central plane M, such that when viewed from a position a, an angle α, from a longitudinal axis, spaces each of the cutting blades on either side of the central plane M, such that the angle α for cutting edges opens to the left in a first direction at one end of a tool body and opens to the right in a second direction at another end of the tool body, wherein the angle α is greater in the case of a first inner cutting edge than in the case of a second outer cutting edge on either end of the tool body taken from a center line, and wherein when viewed from a position b, the cutting edges of the cutting blades on opposite sides of the central plane M form with the central plane M an acute angle β, acute angle β opens towards an edge of the tool body in such a way that the cutting edges are on opposite sides of the central plane M and project over different sides of the central plane M and wherein the cutting edges of the cutting blades follow one another in a sequence in a longitudinal direction of the tool body. 
 
     
     
       2. The system according to  claim 1 , wherein the system further includes a tool having a surface roughness on at least a partial region of a surface of a body of the tool. 
     
     
       3. The system according to  claim 1 , wherein the system further includes a tool comprising an elastic tool head which is connected to the handpiece coupling by means of a rigid or essentially rigid tool section. 
     
     
       4. The system according to  claim 3 , wherein the elastic tool head is bell-shaped. 
     
     
       5. The system according to  claim 3 , wherein the elastic tool head is a body comprising a tightly sealed deformable outer envelope filled with a liquid or a gel. 
     
     
       6. The system according to  claim 5 , wherein the elastic tool head is formed by an elastic cushion. 
     
     
       7. The system according to  claim 1 , wherein the handpiece coupling is driven by the drive for an oscillating motion in an axial direction of the coupling or for an oscillating swivelling motion about the axis of the coupling. 
     
     
       8. The system according to  claim 1 , further comprising a manually operable securing element on the handpiece for securing the tool. 
     
     
       9. The system according to  claim 1 , wherein the system further includes a tool having a tool body curved at least on a partial region about at least one axis extending in the longitudinal direction of the tool body, or has a reduced thickness or is tapered with a reduced thickness in the longitudinal direction of the tool body.